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Octane level and compression 140-160

posted by  someone claiming to be Blackjackmc on  Mon Aug 18 17:58 CST 2014 [RELATED]

A side note on compression and fuel. I purchased Mazda CX5 1 month ago, 13.1 comp direct injection 2.5 litre, runs on 91 or E10. Exhaust is 4 x2 dual pipes with very long runners, the theory being very little chance of hot exhaust getting back in the combustion to create knock. The piston has small well in centre of head where fuel is injected. Got some stuff with no sign of ping. Love technology.






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